Size-controlled chalcopyrite CuInS_2 nanocrystals:One-pot synthesis and optical characterization  

作　　者：PENG ShengJie LIANG YanLiang CHENG FangYi LIANG Jing 

机构地区：[1]Key Laboratory of Functional Polymer Materials,Ministry of Education,College of Chemistry,Nankai University,Tianjin 300071,China

出　　处：《Science China Chemistry》2012年第7期1236-1241,共6页中国科学（化学英文版）

基　　金：supported by the National Basic Research Program of China(2009CB220003);the National High Technology Research and Development Progress of China (2009AA03Z233);MOE Innovation team (IRT0927);the Fundamental Research Funds for the Central Universities

摘　　要：Chalcopyrite ternary CulnS2 semiconductor nanocry stals have been synthesized via a facile one-pot chemical approach by using oleylamine and oleic acid as solvents. The as-prepared CuInS2 nanocrystals have been characterized by instrumental analyses such as X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS）, transmission electron microscopy （TEM）/high-resolution TEM （HRTEM）, energy-dispersive X-ray spectroscopy （EDS）, UV-vis absorption spectroscopy （UV-vis） and photoluminescence （PL） spectroscopy. The particle sizes of the CuInS2 nanocrystals could be tuned from 2 to 10 nm by simply varying reaction conditions. Oleylamine, which acted as both a reductant and an effective capping agent, plays an important role in the size-controlled synthesis of CulnS2 nanocrystals. Based on a series of comparative experiments under different reaction conditions, the probable formation mechanism of CulnS2 nanocrystals has been proposed. Furthermore, the UV-vis absorption and PL emission spectra of the chalcopyrite CulnS2 nanocrystals have been found to be adjustable in the range of 527-815 nm and 625-800 rim, respectively, indicating their potential application in photovoltaic devices.Chalcopyrite ternary CuInS2 semiconductor nanocrystals have been synthesized via a facile one-pot chemical approach by using oleylamine and oleic acid as solvents.The as-prepared CuInS2 nanocrystals have been characterized by instrumental analyses such as X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),transmission electron microscopy(TEM)/high-resolution TEM(HRTEM),energy-dispersive X-ray spectroscopy(EDS),UV-vis absorption spectroscopy(UV-vis) and photoluminescence(PL) spectroscopy.The particle sizes of the CuInS2 nanocrystals could be tuned from 2 to 10 nm by simply varying reaction conditions.Oleylamine,which acted as both a reductant and an effective capping agent,plays an important role in the size-controlled synthesis of CuInS2 nanocrystals.Based on a series of comparative experiments under different reaction conditions,the probable formation mechanism of CuInS2 nanocrystals has been proposed.Furthermore,the UV-vis absorption and PL emission spectra of the chalcopyrite CuInS2 nanocrystals have been found to be adjustable in the range of 527-815 nm and 625-800 nm,respectively,indicating their potential application in photovoltaic devices.

关 键 词：CuInS2 NANOCRYSTALS one-pot synthesis optical property 

分 类 号：O614.121[理学—无机化学] TB383.1[理学—化学]